git.openwrt.org Git - openwrt/staging/blogic.git/log

Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

1) Fix memory leak in iwlwifi, from Matti Gottlieb.

2) Add missing registration of netfilter arp_tables into initial
    namespace, from Florian Westphal.

3) Fix potential NULL deref in DecNET routing code.

4) Restrict NETLINK_URELEASE to truly bound sockets only, from Dmitry
    Ivanov.

5) Fix dst ref counting in VRF, from David Ahern.

6) Fix TSO segmenting limits in i40e driver, from Alexander Duyck.

7) Fix heap leak in PACKET_DIAG_MCLIST, from Mathias Krause.

8) Ravalidate IPV6 datagram socket cached routes properly, particularly
    with UDP, from Martin KaFai Lau.

9) Fix endian bug in RDS dp_ack_seq handling, from Qing Huang.

10) Fix stats typing in bcmgenet driver, from Eric Dumazet.

11) Openvswitch needs to orphan SKBs before ipv6 fragmentation handing,
    from Joe Stringer.

12) SPI device reference leak in spi_ks8895 PHY driver, from Mark Brown.

13) atl2 doesn't actually support scatter-gather, so don't advertise the
    feature.  From Ben Hucthings.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (72 commits)
  openvswitch: use flow protocol when recalculating ipv6 checksums
  Driver: Vmxnet3: set CHECKSUM_UNNECESSARY for IPv6 packets
  atl2: Disable unimplemented scatter/gather feature
  net/mlx4_en: Split SW RX dropped counter per RX ring
  net/mlx4_core: Don't allow to VF change global pause settings
  net/mlx4_core: Avoid repeated calls to pci enable/disable
  net/mlx4_core: Implement pci_resume callback
  net: phy: spi_ks8895: Don't leak references to SPI devices
  net: ethernet: davinci_emac: Fix platform_data overwrite
  net: ethernet: davinci_emac: Fix Unbalanced pm_runtime_enable
  qede: Fix single MTU sized packet from firmware GRO flow
  qede: Fix setting Skb network header
  qede: Fix various memory allocation error flows for fastpath
  tcp: Merge tx_flags and tskey in tcp_shifted_skb
  tcp: Merge tx_flags and tskey in tcp_collapse_retrans
  drivers: net: cpsw: fix wrong regs access in cpsw_ndo_open
  tcp: Fix SOF_TIMESTAMPING_TX_ACK when handling dup acks
  openvswitch: Orphan skbs before IPv6 defrag
  Revert "Prevent NUll pointer dereference with two PHYs on cpsw"
  VSOCK: Only check error on skb_recv_datagram when skb is NULL
  ...

openvswitch: use flow protocol when recalculating ipv6 checksums

When using masked actions the ipv6_proto field of an action
to set IPv6 fields may be zero rather than the prevailing protocol
which will result in skipping checksum recalculation.

This patch resolves the problem by relying on the protocol
in the flow key rather than that in the set field action.

Fixes: 83d2b9ba1abc ("net: openvswitch: Support masked set actions.")
Cc: Jarno Rajahalme <jrajahalme@nicira.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Driver: Vmxnet3: set CHECKSUM_UNNECESSARY for IPv6 packets

For IPv6, if the device indicates that the checksum is correct, set
CHECKSUM_UNNECESSARY.

Reported-by: Subbarao Narahari <snarahari@vmware.com>
Signed-off-by: Shrikrishna Khare <skhare@vmware.com>
Signed-off-by: Jin Heo <heoj@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

atl2: Disable unimplemented scatter/gather feature

atl2 includes NETIF_F_SG in hw_features even though it has no support
for non-linear skbs. This bug was originally harmless since the
driver does not claim to implement checksum offload and that used to
be a requirement for SG.

Now that SG and checksum offload are independent features, if you
explicitly enable SG *and* use one of the rare protocols that can use
SG without checkusm offload, this potentially leaks sensitive
information (before you notice that it just isn't working). Therefore
this obscure bug has been designated CVE-2016-2117.

Reported-by: Justin Yackoski <jyackoski@crypto-nite.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Fixes: ec5f06156423 ("net: Kill link between CSUM and SG features.")
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'mlx4-fixes'

Or Gerlitz says:

====================
Mellaox 40G driver fixes for 4.6-rc

With the fix for ARM bug being under the works, these are
few other fixes for mlx4 we have ready to go.

Eran addressed the problematic/wrong reporting of dropped packets, Daniel
fixed some matters related to PPC EEH's and Jenny's patch makes sure
VFs can't change the port's pause settings.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net/mlx4_en: Split SW RX dropped counter per RX ring

Count SW packet drops per RX ring instead of a global counter. This
will allow monitoring the number of rx drops per ring.

In addition, SW rx_dropped counter was overwritten by HW rx_dropped
counter, sum both of them instead to show the accurate value.

Fixes: a3333b35da16 ('net/mlx4_en: Moderate ethtool callback to [...] ')
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reported-by: Brenden Blanco <bblanco@plumgrid.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mlx4_core: Don't allow to VF change global pause settings

Currently changing global pause settings is done via SET_PORT
command with input modifier GENERAL. This command is allowed
for each VF since MTU setting is done via the same command.

Change the above to the following scheme: before passing the
request to the FW, the PF will check whether it was issued
by a slave. If yes, don't change global pause and warn,
otherwise change to the requested value and store for
further reference.

Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mlx4_core: Avoid repeated calls to pci enable/disable

Maintain the PCI status and provide wrappers for enabling and disabling
the PCI device. Performing the actions more than once without doing
its opposite results in warning logs.

This occurred when EEH hotplugged the device causing a warning for
disabling an already disabled device.

Fixes: 2ba5fbd62b25 ('net/mlx4_core: Handle AER flow properly')
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mlx4_core: Implement pci_resume callback

Move resume related activities to a new pci_resume function instead of
performing them in mlx4_pci_slot_reset. This change is needed to avoid
a hotplug during EEH recovery due to commit f2da4ccf8bd4 ("powerpc/eeh:
More relaxed hotplug criterion").

Fixes: 2ba5fbd62b25 ('net/mlx4_core: Handle AER flow properly')
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: phy: spi_ks8895: Don't leak references to SPI devices

The ks8895 driver is using spi_dev_get() apparently just to take a copy
of the SPI device used to instantiate it but never calls spi_dev_put()
to free it. Since the device is guaranteed to exist between probe() and
remove() there should be no need for the driver to take an extra
reference to it so fix the leak by just using a straight assignment.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: davinci_emac: Fix platform_data overwrite

When the DaVinci emac driver is removed and re-probed, the actual
pdev->dev.platform_data is populated with an unwanted valid pointer saved by
the previous davinci_emac_of_get_pdata() call, causing a kernel crash when
calling priv->int_disable() in emac_int_disable().

Unable to handle kernel paging request at virtual address c8622a80
...
[<c0426fb4>] (emac_int_disable) from [<c0427700>] (emac_dev_open+0x290/0x5f8)
[<c0427700>] (emac_dev_open) from [<c04c00ec>] (__dev_open+0xb8/0x120)
[<c04c00ec>] (__dev_open) from [<c04c0370>] (__dev_change_flags+0x88/0x14c)
[<c04c0370>] (__dev_change_flags) from [<c04c044c>] (dev_change_flags+0x18/0x48)
[<c04c044c>] (dev_change_flags) from [<c052bafc>] (devinet_ioctl+0x6b4/0x7ac)
[<c052bafc>] (devinet_ioctl) from [<c04a1428>] (sock_ioctl+0x1d8/0x2c0)
[<c04a1428>] (sock_ioctl) from [<c014f054>] (do_vfs_ioctl+0x41c/0x600)
[<c014f054>] (do_vfs_ioctl) from [<c014f2a4>] (SyS_ioctl+0x6c/0x7c)
[<c014f2a4>] (SyS_ioctl) from [<c000ff60>] (ret_fast_syscall+0x0/0x1c)

Fixes: 42f59967a091 ("net: ethernet: davinci_emac: add OF support")
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: ethernet: davinci_emac: Fix Unbalanced pm_runtime_enable

In order to avoid an Unbalanced pm_runtime_enable in the DaVinci
emac driver when the device is removed and re-probed, and a
pm_runtime_disable() call in davinci_emac_remove().

Actually, using unbind/bind on a TI DM8168 SoC gives :
$ echo 4a120000.ethernet > /sys/bus/platform/drivers/davinci_emac/unbind
net eth1: DaVinci EMAC: davinci_emac_remove()
$ echo 4a120000.ethernet > /sys/bus/platform/drivers/davinci_emac/bind
davinci_emac 4a120000.ethernet: Unbalanced pm_runtime_enable

Cc: Brian Hutchinson <b.hutchman@gmail.com>
Fixes: 3ba97381343b ("net: ethernet: davinci_emac: add pm_runtime support")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'qed-fixes'

Manish Chopra says:

====================
qede: Bug fixes

This series fixes -

* various memory allocation failure flows for fastpath
* issues with respect to driver GRO packets handling

V1->V2

* Send series against net instead of net-next.

Please consider applying this series to "net"
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

qede: Fix single MTU sized packet from firmware GRO flow

In firmware assisted GRO flow there could be a single MTU sized
segment arriving due to firmware aggregation timeout/last segment
in an aggregation flow, which is not expected to be an actual gro
packet. So If a skb has zero frags from the GRO flow then simply
push it in the stack as non gso skb.

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: Yuval Mintz <yuval.mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

qede: Fix setting Skb network header

Skb's network header needs to be set before extracting IPv4/IPv6
headers from it.

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: Yuval Mintz <yuval.mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

qede: Fix various memory allocation error flows for fastpath

This patch handles memory allocation failures for fastpath
gracefully in the driver.

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: Yuval Mintz <yuval.mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'tcp-coalesce-merge-timestamps'

Martin KaFai Lau says:

====================
tcp: Merge timestamp info when coalescing skbs

This series is separated from the RFC series related to
tcp_sendmsg(MSG_EOR) and it is targeting for the net branch.
This patchset is focusing on fixing cases where TCP
timestamp could be lost after coalescing skbs.

A BPF prog is used to kprobe to sock_queue_err_skb()
and print out the value of serr->ee.ee_data. The BPF
prog (run-able from bcc) is attached here:

BPF prog used for testing:
~~~~~

from __future__ import print_function
from bcc import BPF

bpf_text = """

int trace_err_skb(struct pt_regs *ctx)
{
struct sk_buff *skb = (struct sk_buff *)ctx->si;
struct sock *sk = (struct sock *)ctx->di;
struct sock_exterr_skb *serr;
u32 ee_data = 0;

if (!sk || !skb)
return 0;

serr = SKB_EXT_ERR(skb);
bpf_probe_read(&ee_data, sizeof(ee_data), &serr->ee.ee_data);
bpf_trace_printk("ee_data:%u\\n", ee_data);

return 0;
};
"""

b = BPF(text=bpf_text)
b.attach_kprobe(event="sock_queue_err_skb", fn_name="trace_err_skb")
print("Attached to kprobe")
b.trace_print()
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: Merge tx_flags and tskey in tcp_shifted_skb

After receiving sacks, tcp_shifted_skb() will collapse
skbs if possible. tx_flags and tskey also have to be
merged.

This patch reuses the tcp_skb_collapse_tstamp() to handle
them.

BPF Output Before:
~~~~~
<no-output-due-to-missing-tstamp-event>

BPF Output After:
~~~~~
<...>-2024 [007] d.s. 88.644374: : ee_data:14599

Packetdrill Script:
~~~~~
+0 `sysctl -q -w net.ipv4.tcp_min_tso_segs=10`
+0 `sysctl -q -w net.ipv4.tcp_no_metrics_save=1`
+0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
+0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
+0 bind(3, ..., ...) = 0
+0 listen(3, 1) = 0

0.100 < S 0:0(0) win 32792 <mss 1460,sackOK,nop,nop,nop,wscale 7>
0.100 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 7>
0.200 < . 1:1(0) ack 1 win 257
0.200 accept(3, ..., ...) = 4
+0 setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = 0

0.200 write(4, ..., 1460) = 1460
+0 setsockopt(4, SOL_SOCKET, 37, [2688], 4) = 0
0.200 write(4, ..., 13140) = 13140

0.200 > P. 1:1461(1460) ack 1
0.200 > . 1461:8761(7300) ack 1
0.200 > P. 8761:14601(5840) ack 1

0.300 < . 1:1(0) ack 1 win 257 <sack 1461:14601,nop,nop>
0.300 > P. 1:1461(1460) ack 1
0.400 < . 1:1(0) ack 14601 win 257

0.400 close(4) = 0
0.400 > F. 14601:14601(0) ack 1
0.500 < F. 1:1(0) ack 14602 win 257
0.500 > . 14602:14602(0) ack 2

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Tested-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: Merge tx_flags and tskey in tcp_collapse_retrans

If two skbs are merged/collapsed during retransmission, the current
logic does not merge the tx_flags and tskey. The end result is
the SCM_TSTAMP_ACK timestamp could be missing for a packet.

The patch:
1. Merge the tx_flags
2. Overwrite the prev_skb's tskey with the next_skb's tskey

BPF Output Before:
~~~~~~
<no-output-due-to-missing-tstamp-event>

BPF Output After:
~~~~~~
packetdrill-2092 [001] d.s. 453.998486: : ee_data:1459

Packetdrill Script:
~~~~~~
+0 `sysctl -q -w net.ipv4.tcp_min_tso_segs=10`
+0 `sysctl -q -w net.ipv4.tcp_no_metrics_save=1`
+0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
+0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
+0 bind(3, ..., ...) = 0
+0 listen(3, 1) = 0

0.100 < S 0:0(0) win 32792 <mss 1460,sackOK,nop,nop,nop,wscale 7>
0.100 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 7>
0.200 < . 1:1(0) ack 1 win 257
0.200 accept(3, ..., ...) = 4
+0 setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = 0

0.200 write(4, ..., 730) = 730
+0 setsockopt(4, SOL_SOCKET, 37, [2688], 4) = 0
0.200 write(4, ..., 730) = 730
+0 setsockopt(4, SOL_SOCKET, 37, [2176], 4) = 0
0.200 write(4, ..., 11680) = 11680
+0 setsockopt(4, SOL_SOCKET, 37, [2688], 4) = 0

0.200 > P. 1:731(730) ack 1
0.200 > P. 731:1461(730) ack 1
0.200 > . 1461:8761(7300) ack 1
0.200 > P. 8761:13141(4380) ack 1

0.300 < . 1:1(0) ack 1 win 257 <sack 1461:2921,nop,nop>
0.300 < . 1:1(0) ack 1 win 257 <sack 1461:4381,nop,nop>
0.300 < . 1:1(0) ack 1 win 257 <sack 1461:5841,nop,nop>
0.300 > P. 1:1461(1460) ack 1
0.400 < . 1:1(0) ack 13141 win 257

0.400 close(4) = 0
0.400 > F. 13141:13141(0) ack 1
0.500 < F. 1:1(0) ack 13142 win 257
0.500 > . 13142:13142(0) ack 2

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Tested-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers: net: cpsw: fix wrong regs access in cpsw_ndo_open

The cpsw_ndo_open() could try to access CPSW registers before
calling pm_runtime_get_sync(). This will trigger L3 error:

WARNING: CPU: 0 PID: 21 at drivers/bus/omap_l3_noc.c:147 l3_interrupt_handler+0x220/0x34c()
44000000.ocp:L3 Custom Error: MASTER M2 (64-bit) TARGET L4_FAST (Idle): Data Access in Supervisor mode during Functional access

and CPSW will stop functioning.

Hence, fix it by moving pm_runtime_get_sync() before the first access
to CPSW registers in cpsw_ndo_open().

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: Fix SOF_TIMESTAMPING_TX_ACK when handling dup acks

Assuming SOF_TIMESTAMPING_TX_ACK is on. When dup acks are received,
it could incorrectly think that a skb has already
been acked and queue a SCM_TSTAMP_ACK cmsg to the
sk->sk_error_queue.

In tcp_ack_tstamp(), it checks
'between(shinfo->tskey, prior_snd_una, tcp_sk(sk)->snd_una - 1)'.
If prior_snd_una == tcp_sk(sk)->snd_una like the following packetdrill
script, between() returns true but the tskey is actually not acked.
e.g. try between(3, 2, 1).

The fix is to replace between() with one before() and one !before().
By doing this, the -1 offset on the tcp_sk(sk)->snd_una can also be
removed.

A packetdrill script is used to reproduce the dup ack scenario.
Due to the lacking cmsg support in packetdrill (may be I
cannot find it),  a BPF prog is used to kprobe to
sock_queue_err_skb() and print out the value of
serr->ee.ee_data.

Both the packetdrill and the bcc BPF script is attached at the end of
this commit message.

BPF Output Before Fix:
~~~~~~
      <...>-2056  [001] d.s.   433.927987: : ee_data:1459  #incorrect
packetdrill-2056  [001] d.s.   433.929563: : ee_data:1459  #incorrect
packetdrill-2056  [001] d.s.   433.930765: : ee_data:1459  #incorrect
packetdrill-2056  [001] d.s.   434.028177: : ee_data:1459
packetdrill-2056  [001] d.s.   434.029686: : ee_data:14599

BPF Output After Fix:
~~~~~~
      <...>-2049  [000] d.s.   113.517039: : ee_data:1459
      <...>-2049  [000] d.s.   113.517253: : ee_data:14599

BCC BPF Script:
~~~~~~
#!/usr/bin/env python

from __future__ import print_function
from bcc import BPF

bpf_text = """
#include <uapi/linux/ptrace.h>
#include <net/sock.h>
#include <bcc/proto.h>
#include <linux/errqueue.h>

#ifdef memset
#undef memset
#endif

int trace_err_skb(struct pt_regs *ctx)
{
struct sk_buff *skb = (struct sk_buff *)ctx->si;
struct sock *sk = (struct sock *)ctx->di;
struct sock_exterr_skb *serr;
u32 ee_data = 0;

if (!sk || !skb)
return 0;

serr = SKB_EXT_ERR(skb);
bpf_probe_read(&ee_data, sizeof(ee_data), &serr->ee.ee_data);
bpf_trace_printk("ee_data:%u\\n", ee_data);

return 0;
};
"""

b = BPF(text=bpf_text)
b.attach_kprobe(event="sock_queue_err_skb", fn_name="trace_err_skb")
print("Attached to kprobe")
b.trace_print()

Packetdrill Script:
~~~~~~
+0 `sysctl -q -w net.ipv4.tcp_min_tso_segs=10`
+0 `sysctl -q -w net.ipv4.tcp_no_metrics_save=1`
+0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
+0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
+0 bind(3, ..., ...) = 0
+0 listen(3, 1) = 0

0.100 < S 0:0(0) win 32792 <mss 1460,sackOK,nop,nop,nop,wscale 7>
0.100 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 7>
0.200 < . 1:1(0) ack 1 win 257
0.200 accept(3, ..., ...) = 4
+0 setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = 0

+0 setsockopt(4, SOL_SOCKET, 37, [2688], 4) = 0
0.200 write(4, ..., 1460) = 1460
0.200 write(4, ..., 13140) = 13140

0.200 > P. 1:1461(1460) ack 1
0.200 > . 1461:8761(7300) ack 1
0.200 > P. 8761:14601(5840) ack 1

0.300 < . 1:1(0) ack 1 win 257 <sack 1461:2921,nop,nop>
0.300 < . 1:1(0) ack 1 win 257 <sack 1461:4381,nop,nop>
0.300 < . 1:1(0) ack 1 win 257 <sack 1461:5841,nop,nop>
0.300 > P. 1:1461(1460) ack 1
0.400 < . 1:1(0) ack 14601 win 257

0.400 close(4) = 0
0.400 > F. 14601:14601(0) ack 1
0.500 < F. 1:1(0) ack 14602 win 257
0.500 > . 14602:14602(0) ack 2

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Soheil Hassas Yeganeh <soheil.kdev@gmail.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Tested-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

openvswitch: Orphan skbs before IPv6 defrag

This is the IPv6 counterpart to commit 8282f27449bf ("inet: frag: Always
orphan skbs inside ip_defrag()").

Prior to commit 029f7f3b8701 ("netfilter: ipv6: nf_defrag: avoid/free
clone operations"), ipv6 fragments sent to nf_ct_frag6_gather() would be
cloned (implicitly orphaning) prior to queueing for reassembly. As such,
when the IPv6 message is eventually reassembled, the skb->sk for all
fragments would be NULL. After that commit was introduced, rather than
cloning, the original skbs were queued directly without orphaning. The
end result is that all frags except for the first and last may have a
socket attached.

This commit explicitly orphans such skbs during nf_ct_frag6_gather() to
prevent BUG_ON(skb->sk) during a later call to ip6_fragment().

kernel BUG at net/ipv6/ip6_output.c:631!
[...]
Call Trace:
<IRQ>
[<ffffffff810be8f7>] ? __lock_acquire+0x927/0x20a0
[<ffffffffa042c7c0>] ? do_output.isra.28+0x1b0/0x1b0 [openvswitch]
[<ffffffff810bb8a2>] ? __lock_is_held+0x52/0x70
[<ffffffffa042c587>] ovs_fragment+0x1f7/0x280 [openvswitch]
[<ffffffff810bdab5>] ? mark_held_locks+0x75/0xa0
[<ffffffff817be416>] ? _raw_spin_unlock_irqrestore+0x36/0x50
[<ffffffff81697ea0>] ? dst_discard_out+0x20/0x20
[<ffffffff81697e80>] ? dst_ifdown+0x80/0x80
[<ffffffffa042c703>] do_output.isra.28+0xf3/0x1b0 [openvswitch]
[<ffffffffa042d279>] do_execute_actions+0x709/0x12c0 [openvswitch]
[<ffffffffa04340a4>] ? ovs_flow_stats_update+0x74/0x1e0 [openvswitch]
[<ffffffffa04340d1>] ? ovs_flow_stats_update+0xa1/0x1e0 [openvswitch]
[<ffffffff817be387>] ? _raw_spin_unlock+0x27/0x40
[<ffffffffa042de75>] ovs_execute_actions+0x45/0x120 [openvswitch]
[<ffffffffa0432d65>] ovs_dp_process_packet+0x85/0x150 [openvswitch]
[<ffffffff817be387>] ? _raw_spin_unlock+0x27/0x40
[<ffffffffa042def4>] ovs_execute_actions+0xc4/0x120 [openvswitch]
[<ffffffffa0432d65>] ovs_dp_process_packet+0x85/0x150 [openvswitch]
[<ffffffffa04337f2>] ? key_extract+0x442/0xc10 [openvswitch]
[<ffffffffa043b26d>] ovs_vport_receive+0x5d/0xb0 [openvswitch]
[<ffffffff810be8f7>] ? __lock_acquire+0x927/0x20a0
[<ffffffff810be8f7>] ? __lock_acquire+0x927/0x20a0
[<ffffffff810be8f7>] ? __lock_acquire+0x927/0x20a0
[<ffffffff817be416>] ? _raw_spin_unlock_irqrestore+0x36/0x50
[<ffffffffa043c11d>] internal_dev_xmit+0x6d/0x150 [openvswitch]
[<ffffffffa043c0b5>] ? internal_dev_xmit+0x5/0x150 [openvswitch]
[<ffffffff8168fb5f>] dev_hard_start_xmit+0x2df/0x660
[<ffffffff8168f5ea>] ? validate_xmit_skb.isra.105.part.106+0x1a/0x2b0
[<ffffffff81690925>] __dev_queue_xmit+0x8f5/0x950
[<ffffffff81690080>] ? __dev_queue_xmit+0x50/0x950
[<ffffffff810bdab5>] ? mark_held_locks+0x75/0xa0
[<ffffffff81690990>] dev_queue_xmit+0x10/0x20
[<ffffffff8169a418>] neigh_resolve_output+0x178/0x220
[<ffffffff81752759>] ? ip6_finish_output2+0x219/0x7b0
[<ffffffff81752759>] ip6_finish_output2+0x219/0x7b0
[<ffffffff817525a5>] ? ip6_finish_output2+0x65/0x7b0
[<ffffffff816cde2b>] ? ip_idents_reserve+0x6b/0x80
[<ffffffff8175488f>] ? ip6_fragment+0x93f/0xc50
[<ffffffff81754af1>] ip6_fragment+0xba1/0xc50
[<ffffffff81752540>] ? ip6_flush_pending_frames+0x40/0x40
[<ffffffff81754c6b>] ip6_finish_output+0xcb/0x1d0
[<ffffffff81754dcf>] ip6_output+0x5f/0x1a0
[<ffffffff81754ba0>] ? ip6_fragment+0xc50/0xc50
[<ffffffff81797fbd>] ip6_local_out+0x3d/0x80
[<ffffffff817554df>] ip6_send_skb+0x2f/0xc0
[<ffffffff817555bd>] ip6_push_pending_frames+0x4d/0x50
[<ffffffff817796cc>] icmpv6_push_pending_frames+0xac/0xe0
[<ffffffff8177a4be>] icmpv6_echo_reply+0x42e/0x500
[<ffffffff8177acbf>] icmpv6_rcv+0x4cf/0x580
[<ffffffff81755ac7>] ip6_input_finish+0x1a7/0x690
[<ffffffff81755925>] ? ip6_input_finish+0x5/0x690
[<ffffffff817567a0>] ip6_input+0x30/0xa0
[<ffffffff81755920>] ? ip6_rcv_finish+0x1a0/0x1a0
[<ffffffff817557ce>] ip6_rcv_finish+0x4e/0x1a0
[<ffffffff8175640f>] ipv6_rcv+0x45f/0x7c0
[<ffffffff81755fe6>] ? ipv6_rcv+0x36/0x7c0
[<ffffffff81755780>] ? ip6_make_skb+0x1c0/0x1c0
[<ffffffff8168b649>] __netif_receive_skb_core+0x229/0xb80
[<ffffffff810bdab5>] ? mark_held_locks+0x75/0xa0
[<ffffffff8168c07f>] ? process_backlog+0x6f/0x230
[<ffffffff8168bfb6>] __netif_receive_skb+0x16/0x70
[<ffffffff8168c088>] process_backlog+0x78/0x230
[<ffffffff8168c0ed>] ? process_backlog+0xdd/0x230
[<ffffffff8168db43>] net_rx_action+0x203/0x480
[<ffffffff810bdab5>] ? mark_held_locks+0x75/0xa0
[<ffffffff817c156e>] __do_softirq+0xde/0x49f
[<ffffffff81752768>] ? ip6_finish_output2+0x228/0x7b0
[<ffffffff817c070c>] do_softirq_own_stack+0x1c/0x30
<EOI>
[<ffffffff8106f88b>] do_softirq.part.18+0x3b/0x40
[<ffffffff8106f946>] __local_bh_enable_ip+0xb6/0xc0
[<ffffffff81752791>] ip6_finish_output2+0x251/0x7b0
[<ffffffff81754af1>] ? ip6_fragment+0xba1/0xc50
[<ffffffff816cde2b>] ? ip_idents_reserve+0x6b/0x80
[<ffffffff8175488f>] ? ip6_fragment+0x93f/0xc50
[<ffffffff81754af1>] ip6_fragment+0xba1/0xc50
[<ffffffff81752540>] ? ip6_flush_pending_frames+0x40/0x40
[<ffffffff81754c6b>] ip6_finish_output+0xcb/0x1d0
[<ffffffff81754dcf>] ip6_output+0x5f/0x1a0
[<ffffffff81754ba0>] ? ip6_fragment+0xc50/0xc50
[<ffffffff81797fbd>] ip6_local_out+0x3d/0x80
[<ffffffff817554df>] ip6_send_skb+0x2f/0xc0
[<ffffffff817555bd>] ip6_push_pending_frames+0x4d/0x50
[<ffffffff81778558>] rawv6_sendmsg+0xa28/0xe30
[<ffffffff81719097>] ? inet_sendmsg+0xc7/0x1d0
[<ffffffff817190d6>] inet_sendmsg+0x106/0x1d0
[<ffffffff81718fd5>] ? inet_sendmsg+0x5/0x1d0
[<ffffffff8166d078>] sock_sendmsg+0x38/0x50
[<ffffffff8166d4d6>] SYSC_sendto+0xf6/0x170
[<ffffffff8100201b>] ? trace_hardirqs_on_thunk+0x1b/0x1d
[<ffffffff8166e38e>] SyS_sendto+0xe/0x10
[<ffffffff817bebe5>] entry_SYSCALL_64_fastpath+0x18/0xa8
Code: 06 48 83 3f 00 75 26 48 8b 87 d8 00 00 00 2b 87 d0 00 00 00 48 39 d0 72 14 8b 87 e4 00 00 00 83 f8 01 75 09 48 83 7f 18 00 74 9a <0f> 0b 41 8b 86 cc 00 00 00 49 8#
RIP [<ffffffff8175468a>] ip6_fragment+0x73a/0xc50
RSP <ffff880072803120>

Fixes: 029f7f3b8701 ("netfilter: ipv6: nf_defrag: avoid/free clone
operations")
Reported-by: Daniele Di Proietto <diproiettod@vmware.com>
Signed-off-by: Joe Stringer <joe@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
"Three further fixes for ARM.

  Alexandre Courbot was having problems with DMA allocations with the
  GFP flags affecting where the tracking data was being allocated from.
  Vladimir Murzin noticed that the CPU feature code was not entirely
  correct, which can cause some features to be misreported"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8564/1: fix cpu feature extracting helper
  ARM: 8563/1: fix demoting HWCAP_SWP
  ARM: 8551/2: DMA: Fix kzalloc flags in __dma_alloc

Merge tag 'fbdev-fixes-4.6' of git://git./linux/kernel/git/tomba/linux

Pull fbdev fixes from Tomi Valkeinen:

- ARM CLCD: fix regression on multiplatform kernels

- panel-sharp-ls037v7dw01: fix possible NULL deref

* tag 'fbdev-fixes-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux:
omapfb: panel-sharp-ls037v7dw01: fix check of gpio_to_desc() return value
video: ARM CLCD: runtime check for Versatile

Merge tag 'platform-drivers-x86-v4.6-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86

Pull x86 platform driver fixes from Darren Hart:
"An S4 fix for intel-hid, new platform 'quirk' for hp_accel, a fix for
  broader support of ACPI resources for the Intel P-unit, and a few
  uninitialized variable fixes.

  intel p-unit:
   - decouple telemetry driver from the optional IPC resources

  thinkpad_acpi:
   - Silence an uninitialized variable warning

  intel_telemetry_pltdrv:
   - Silence an uninitialized variable warning

  hp_accel:
   - Silence an uninitialized variable warning
   - Add support for HP ProBook 440 G3

  intel-hid:
   - add a workaround to ignore an event after waking up from S4"

* tag 'platform-drivers-x86-v4.6-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86:
  platform:x86 decouple telemetry driver from the optional IPC resources
  thinkpad_acpi: Silence an uninitialized variable warning
  intel_telemetry_pltdrv: Silence an uninitialized variable warning
  hp_accel: Silence an uninitialized variable warning
  hp_accel: Add support for HP ProBook 440 G3
  intel-hid: add a workaround to ignore an event after waking up from S4.

Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:
"This fixes the following issues:

   - Incorrect output buffer size calculation in rsa-pkcs1pad

   - Uninitialised padding bytes on exported state in ccp driver

   - Potentially freed pointer used on completion callback in sha1-mb"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: ccp - Prevent information leakage on export
  crypto: sha1-mb - use corrcet pointer while completing jobs
  crypto: rsa-pkcs1pad - fix dst len

Revert "Prevent NUll pointer dereference with two PHYs on cpsw"

This reverts commit cfe255600154f0072d4a8695590dbd194dfd1aeb

This can result in a "Unable to handle kernel paging request"
during boot. This was due to using an uninitialised struct member,
data->slaves.

Signed-off-by: Andrew Goodbody <andrew.goodbody@cambrionix.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

VSOCK: Only check error on skb_recv_datagram when skb is NULL

If skb_recv_datagram returns an skb, we should ignore the err
value returned. Otherwise, datagram receives will return EAGAIN
when they have to wait for a datagram.

Acked-by: Adit Ranadive <aditr@vmware.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

cls_cgroup: get sk_classid only from full sockets

skb->sk could point to timewait or request socket which has no sk_classid.
Detected as "BUG: KASAN: slab-out-of-bounds in cls_cgroup_classify".

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mlx4_en: do batched put_page using atomic_sub

This patch fixes couple error paths after allocation failures.
Atomic set of page reference counter is safe only if it is zero,
otherwise set can race with any speculative get_page_unless_zero.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mlx4_en: allocate non 0-order pages for RX ring with __GFP_NOMEMALLOC

High order pages are optional here since commit 51151a16a60f ("mlx4: allow
order-0 memory allocations in RX path"), so here is no reason for depleting
reserves. Generic __netdev_alloc_frag() implements the same logic.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'ptmx-cleanup'

Merge the ptmx internal interface cleanup branch.

This doesn't change semantics, but it should be a sane basis for
eventually getting the multi-instance devpts code into some sane shape
where we can get rid of the kernel config option. Which we can
hopefully get done next merge window..

* ptmx-cleanup:
devpts: clean up interface to pty drivers

platform:x86 decouple telemetry driver from the optional IPC resources

Currently the optional IPC resources prevent telemetry driver from
probing if these resources are not in ACPI table. This patch decouples
telemetry driver from these optional resources, so that telemetry driver
has dependency only on the necessary ACPI resources.

Signed-off-by: Aubrey Li <aubrey.li@linux.intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

ARM: 8564/1: fix cpu feature extracting helper

Commit b8c9592 "ARM: 8318/1: treat CPU feature register fields as signed
quantities" introduced helper to extract signed quantities of 4-bit
blocks. However, with a current code feature with value 0b1000 isn't
rejected as negative. So fix the "if" condition.

Reported-by: Jonathan Brawn <Jon.Brawn@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

ARM: 8563/1: fix demoting HWCAP_SWP

Commit b8c9592 "ARM: 8318/1: treat CPU feature register fields as signed
quantities" accidentally altered cpuid register used to demote
HWCAP_SWP.
ARM ARM says that SyncPrim_instrs bits in ID_ISAR3 should be used with
SynchPrim_instrs_frac from ID_ISAR4. So, follow this rule.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Merge tag 'pci-v4.6-fixes-2' of git://git./linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:
"These are fixes for two issues:

   - The VPD parsing code we added for v4.6 keeps some devices from
     crashing, but also keeps cxgb4 from reading non-standard extra VPD
     data that is relies on.  Hariprasad added a way for the driver to
     specify how much VPD is valid.

   - The i.MX6 active-low reset GPIO support we added in v4.5 caused
     regressions on some boards, so we're reverting that.

  VPD:
    Add pci_set_vpd_size() (Hariprasad Shenai)
    cxgb4: Set VPD size so we can read both VPD structures (Hariprasad Shenai)

  Freescale i.MX6 host bridge driver:
    Revert "PCI: imx6: Add support for active-low reset GPIO" (Fabio Estevam)"

* tag 'pci-v4.6-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  cxgb4: Set VPD size so we can read both VPD structures
  PCI: Add pci_set_vpd_size() to set VPD size
  Revert "PCI: imx6: Add support for active-low reset GPIO"

devpts: clean up interface to pty drivers

This gets rid of the horrible notion of having that

    struct inode *ptmx_inode

be the linchpin of the interface between the pty code and devpts.

By de-emphasizing the ptmx inode, a lot of things actually get cleaner,
and we will have a much saner way forward.  In particular, this will
allow us to associate with any particular devpts instance at open-time,
and not be artificially tied to one particular ptmx inode.

The patch itself is actually fairly straightforward, and apart from some
locking and return path cleanups it's pretty mechanical:

- the interfaces that devpts exposes all take "struct pts_fs_info *"
   instead of "struct inode *ptmx_inode" now.

   NOTE! The "struct pts_fs_info" thing is a completely opaque structure
   as far as the pty driver is concerned: it's still declared entirely
   internally to devpts. So the pty code can't actually access it in any
   way, just pass it as a "cookie" to the devpts code.

- the "look up the pts fs info" is now a single clear operation, that
   also does the reference count increment on the pts superblock.

   So "devpts_add/del_ref()" is gone, and replaced by a "lookup and get
   ref" operation (devpts_get_ref(inode)), along with a "put ref" op
   (devpts_put_ref()).

- the pty master "tty->driver_data" field now contains the pts_fs_info,
   not the ptmx inode.

- because we don't care about the ptmx inode any more as some kind of
   base index, the ref counting can now drop the inode games - it just
   gets the ref on the superblock.

- the pts_fs_info now has a back-pointer to the super_block. That's so
   that we can easily look up the information we actually need. Although
   quite often, the pts fs info was actually all we wanted, and not having
   to look it up based on some magical inode makes things more
   straightforward.

In particular, now that "devpts_get_ref(inode)" operation should really
be the *only* place we need to look up what devpts instance we're
associated with, and we do it exactly once, at ptmx_open() time.

The other side of this is that one ptmx node could now be associated
with multiple different devpts instances - you could have a single
/dev/ptmx node, and then have multiple mount namespaces with their own
instances of devpts mounted on /dev/pts/.  And that's all perfectly sane
in a model where we just look up the pts instance at open time.

This will eventually allow us to get rid of our odd single-vs-multiple
pts instance model, but this patch in itself changes no semantics, only
an internal binding model.

Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Peter Anvin <hpa@zytor.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Serge Hallyn <serge.hallyn@ubuntu.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Cc: Jann Horn <jann@thejh.net>
Cc: Greg KH <greg@kroah.com>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Florian Weimer <fw@deneb.enyo.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:
"A couple of bug fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: add CPU_BIG_ENDIAN config option
  s390/spinlock: avoid yield to non existent cpu
  s390/dcssblk: fix possible deadlock in remove vs. per-device attributes
  s390/seccomp: include generic seccomp header file
  s390/pci: add extra padding to function measurement block
  s390/scm_blk: fix deadlock for requests != REQ_TYPE_FS

omapfb: panel-sharp-ls037v7dw01: fix check of gpio_to_desc() return value

The change fixes a check of gpio_to_desc() return value, the function
returns either a valid pointer to struct gpio_desc or NULL, this makes
IS_ERR() check invalid and may lead to a NULL pointer dereference in
runtime.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

video: ARM CLCD: runtime check for Versatile

The current compile-time check for inversed IENB/CNTL does not
work in multiplatform boots: as soon as versatile is included
in the build, the IENB/CNTL is switched and breaks graphics.
Convert this to a runtime switch.

Cc: stable@vger.kernel.org
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Fixes: a29da136de34 ("ARM: versatile: convert to multi-platform")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Linux 4.6-rc4

macsec: fix crypto Kconfig dependency

The new MACsec driver uses the AES crypto algorithm, but can be configured
even if CONFIG_CRYPTO is disabled, leading to a build error:

warning: (MAC80211 && MACSEC) selects CRYPTO_GCM which has unmet direct dependencies (CRYPTO)
warning: (BT && CEPH_LIB && INET && MAC802154 && MAC80211 && BLK_DEV_RBD && MACSEC && AIRO_CS && LIBIPW && HOSTAP && USB_WUSB && RTLLIB_CRYPTO_CCMP && FS_ENCRYPTION && EXT4_ENCRYPTION && CEPH_FS && BIG_KEYS && ENCRYPTED_KEYS) selects CRYPTO_AES which has unmet direct dependencies (CRYPTO)
crypto/built-in.o: In function `gcm_enc_copy_hash':
aes_generic.c:(.text+0x2b8): undefined reference to `crypto_xor'
aes_generic.c:(.text+0x2dc): undefined reference to `scatterwalk_map_and_copy'

This adds an explicit 'select CRYPTO' statement the way that other
drivers handle it.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver")
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'dm-4.6-fix-2' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fix from Mike Snitzer:
"Fix for earlier 4.6-rc4 stable@ commit that introduced improper use of
  write lock in cmd_read_lock() -- due to cut-n-paste gone awry (and
  sparse didn't catch it)"

* tag 'dm-4.6-fix-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm cache metadata: fix cmd_read_lock() acquiring write lock

dm cache metadata: fix cmd_read_lock() acquiring write lock

Commit 9567366fefdd ("dm cache metadata: fix READ_LOCK macros and
cleanup WRITE_LOCK macros") uses down_write() instead of down_read() in
cmd_read_lock(), yet up_read() is used to release the lock in
READ_UNLOCK(). Fix it.

Fixes: 9567366fefdd ("dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros")
Cc: stable@vger.kernel.org
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

Merge tag 'char-misc-4.6-rc4' of git://git./linux/kernel/git/gregkh/char-misc

Pull char/misc fixes from Greg KH:
"Here are some small char/misc driver fixes for 4.6-rc4.  Full details
  are in the shortlog, nothing major here.

  These have all been in linux-next for a while with no reported issues"

* tag 'char-misc-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  lkdtm: do not leak free page on kmalloc failure
  lkdtm: fix memory leak of base
  lkdtm: fix memory leak of val
  extcon: palmas: Drop stray IRQF_EARLY_RESUME flag

Merge tag 'driver-core-4.6-rc4' of git://git./linux/kernel/git/gregkh/driver-core

Pull misc fixes from Greg KH:
"Here are three small fixes for 4.6-rc4.

  Two fix up some lz4 issues with big endian systems, and the remaining
  one resolves a minor debugfs issue that was reported.

  All have been in linux-next with no reported issues"

* tag 'driver-core-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  lib: lz4: cleanup unaligned access efficiency detection
  lib: lz4: fixed zram with lz4 on big endian machines
  debugfs: Make automount point inodes permanently empty

Merge tag 'usb-4.6-rc4' of git://git./linux/kernel/git/gregkh/usb

Pull USB driver fixes from Greg KH:
"Here are some small USB fixes for 4.6-rc4.

  Mostly xhci fixes for reported issues, a UAS bug that has hit a number
  of people, including stable tree users, and a few other minor things.

  All have been in linux-next for a while with no reported issues"

* tag 'usb-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: hcd: out of bounds access in for_each_companion
  USB: uas: Add a new NO_REPORT_LUNS quirk
  USB: uas: Limit qdepth at the scsi-host level
  doc: usb: Fix typo in gadget_multi documentation
  usb: host: xhci-plat: Make enum xhci_plat_type start at a non zero value
  xhci: fix 10 second timeout on removal of PCI hotpluggable xhci controllers
  usb: xhci: fix wild pointers in xhci_mem_cleanup
  usb: host: xhci-plat: fix cannot work if R-Car Gen2/3 run on above 4GB phys
  usb: host: xhci: add a new quirk XHCI_NO_64BIT_SUPPORT
  xhci: resume USB 3 roothub first
  usb: xhci: applying XHCI_PME_STUCK_QUIRK to Intel BXT B0 host
  cdc-acm: fix crash if flushed with nothing buffered

net: bcmgenet: device stats are unsigned long

On 64bit kernels, device stats are 64bit wide, not 32bit.

Fixes: 1c1008c793fa4 ("net: bcmgenet: add main driver file")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'dsa-mv88e6xxx-fix-cross-chip-bridging'

Vivien Didelot says:

====================
net: dsa: mv88e6xxx: fix hardware cross-chip bridging

In order to accelerate cross-chip switching of frames with the hardware,
the DSA Tag ports, used to interconnect switch devices, must learn SA
and DA addresses, and share the same FDB with the user ports.

The two first patches restore address learning on DSA links. This fixes
hardware cross-chip bridging in a VLAN filtering enabled system, which
implements a bridge group as a 802.1Q VLAN and thus share an isolated
address database between DSA and user ports.

The third patch changes the distinct default databases used for each
port, to the same address database. This fixes the hardware cross-chip
bridging in a VLAN filtering disabled system, where a bridge group gets
implemented only as a port-based VLAN.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: mv88e6xxx: share the same default FDB

For hardware cross-chip bridging to work, user ports *and* DSA ports
need to share a common address database, in order to switch a frame to
the correct interconnected device.

This is currently working for VLAN filtering aware systems, since Linux
will implement a bridge group as a 802.1Q VLAN, which has its own FDB,
including DSA and CPU links as members.

However when the system doesn't support VLAN filtering, Linux only
relies on the port-based VLAN to implement a bridge group.

To fix hardware cross-chip bridging for such systems, set the same
default address database 0 for user and DSA ports, instead of giving
them all a different default database.

Note that the bridging code prevents frames to egress between unbridged
ports, and flushes FDB entries of a port when changing its STP state.

Also note that the FID 0 is special and means "all" for ATU operations,
but it's OK since it is used as a default forwarding address database.

Fixes: 2db9ce1fd9a3 ("net: dsa: mv88e6xxx: assign default FDB to ports")
Fixes: 466dfa077022 ("net: dsa: mv88e6xxx: assign dynamic FDB to bridges")
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: mv88e6xxx: enable SA learning on DSA ports

In multi-chip systems, DSA Tag ports must learn SA addresses in order to
correctly switch frames between interconnected chips.

This fixes cross-chip hardware bridging in a VLAN filtering aware
system, because a bridge group gets implemented as an hardware 802.1Q
VLAN and thus DSA and user ports share the same FDB.

Fixes: 4c7ea3c0791e ("net: dsa: mv88e6xxx: disable SA learning for DSA and CPU ports")
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: mv88e6xxx: unlock DSA and CPU ports

Locking a port generates an hardware interrupt when a new SA address is
received. This enables CPU directed learning, which is needed for 802.1X
MAC authentication.

To disable automatic learning on a port, the only configuration needed
is to set its Port Association Vector to all zero.

Clear PAV when SA learning should be disabled instead of locking a port.

Fixes: 4c7ea3c0791e ("net: dsa: mv88e6xxx: disable SA learning for DSA and CPU ports")
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

RDS: Fix the atomicity for congestion map update

Two different threads with different rds sockets may be in
rds_recv_rcvbuf_delta() via receive path. If their ports
both map to the same word in the congestion map, then
using non-atomic ops to update it could cause the map to
be incorrect. Lets use atomics to avoid such an issue.

Full credit to Wengang <wen.gang.wang@oracle.com> for
finding the issue, analysing it and also pointing out
to offending code with spin lock based fix.

Reviewed-by: Leon Romanovsky <leon@leon.nu>
Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

RDS: fix endianness for dp_ack_seq

dp->dp_ack_seq is used in big endian format. We need to do the
big endianness conversion when we assign a value in host format
to it.

Signed-off-by: Qing Huang <qing.huang@oracle.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'dmaengine-fix-4.6-rc4' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
"This time we have some odd fixes in hsu, edma, omap and xilinx.

  Usual fixes and nothing special"

* tag 'dmaengine-fix-4.6-rc4' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: dw: fix master selection
  dmaengine: edma: special case slot limit workaround
  dmaengine: edma: Remove dynamic TPTC power management feature
  dmaengine: vdma: don't crash when bad channel is requested
  dmaengine: omap-dma: Do not suppress interrupts for memcpy
  dmaengine: omap-dma: Fix polled channel completion detection and handling
  dmaengine: hsu: correct use of channel status register
  dmaengine: hsu: correct residue calculation of active descriptor
  dmaengine: hsu: set HSU_CH_MTSR to memory width

Merge branch 'locking-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull locking fixlet from Ingo Molnar:
"Fixes a build warning on certain Kconfig combinations"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/lockdep: Fix print_collision() unused warning

Merge branch 'efi-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull EFI fix from Ingo Molnar:
"An arm64 boot crash fix"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/arm64: Don't apply MEMBLOCK_NOMAP to UEFI memory map mapping

Merge branch 'fix/edma' into fixes

Merge branch 'fix/xilinx' into fixes

Merge branch 'fix/omap' into fixes

Merge branch 'fix/hsu' into fixes

vlan: pull on __vlan_insert_tag error path and fix csum correction

When __vlan_insert_tag() fails from skb_vlan_push() path due to the
skb_cow_head(), we need to undo the __skb_push() in the error path
as well that was done earlier to move skb->data pointer to mac header.

Moreover, I noticed that when in the non-error path the __skb_pull()
is done and the original offset to mac header was non-zero, we fixup
from a wrong skb->data offset in the checksum complete processing.

So the skb_postpush_rcsum() really needs to be done before __skb_pull()
where skb->data still points to the mac header start and thus operates
under the same conditions as in __vlan_insert_tag().

Fixes: 93515d53b133 ("net: move vlan pop/push functions into common code")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
"A few fixes for the current series. This contains:

   - Two fixes for NVMe:

     One fixes a reset race that can be triggered by repeated
     insert/removal of the module.

     The other fixes an issue on some platforms, where we get probe
     timeouts since legacy interrupts isn't working.  This used not to
     be a problem since we had the worker thread poll for completions,
     but since that was killed off, it means those poor souls can't
     successfully probe their NVMe device.  Use a proper IRQ check and
     probe (msi-x -> msi ->legacy), like most other drivers to work
     around this.  Both from Keith.

   - A loop corruption issue with offset in iters, from Ming Lei.

   - A fix for not having the partition stat per cpu ref count
     initialized before sending out the KOBJ_ADD, which could cause user
     space to access the counter prior to initialization.  Also from
     Ming Lei.

   - A fix for using the wrong congestion state, from Kaixu Xia"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: loop: fix filesystem corruption in case of aio/dio
  NVMe: Always use MSI/MSI-x interrupts
  NVMe: Fix reset/remove race
  writeback: fix the wrong congested state variable definition
  block: partition: initialize percpuref before sending out KOBJ_ADD

Merge branch 'libnvdimm-fixes' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Ross Zwisler:
"Two fixes:

   - Fix memcpy_from_pmem() to fallback to memcpy() for architectures
     where CONFIG_ARCH_HAS_PMEM_API=n.

   - Add a comment explaining why we write data twice when clearing
     poison in pmem_do_bvec().

  This has passed a boot test on an X86_32 config, which was the
  architecture where issue #1 above was first noticed"

Dan Williams adds:
"We're giving this multi-maintainer setup a shot, so expect libnvdimm
  pull requests from either Ross or I going forward"

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  libnvdimm, pmem: clarify the write+clear_poison+write flow
  pmem: fix BUG() error in pmem.h:48 on X86_32

Merge tag 'for-linus-20160415' of git://git.infradead.org/linux-mtd

Pull MTD fix from Brian Norris:
"One MTD fix for v4.6-rc4:

  In the v4.4 cycle, we relaxed the requirement for assigning
  mtd->owner, but we didn't remove this error case.  It's hit only
  by drivers that are both:

   (a) using nand_scan() directly
  and
   (b) built as modules

  We haven't seen explicit complaints about this (most use cases don't
  fit one or both of the above), but we should definitely not be
  BUG()'ing here"

* tag 'for-linus-20160415' of git://git.infradead.org/linux-mtd:
  mtd: nand: Drop mtd.owner requirement in nand_scan

Merge tag 'mmc-v4.6-rc3' of git://git.linaro.org/people/ulf.hansson/mmc

Pull MMC fixes from Ulf Hansson:
"Here are a couple of mmc fixes intended for v4.6 rc4.

  Regarding the fix for the regression about mmcblk device indexes.  The
  approach taken to solve the problem seems to be good enough.  There
  were some discussions around the solution, but it seems like people
  were happy about it in the end.

  MMC core:
   - Restore similar old behaviour when assigning mmcblk device indexes

  MMC host:
   - tegra: Disable UHS-I modes for Tegra124 to fix regression"

* tag 'mmc-v4.6-rc3' of git://git.linaro.org/people/ulf.hansson/mmc:
  mmc: tegra: Disable UHS-I modes for Tegra124
  mmc: block: Use the mmc host device index as the mmcblk device index

Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
"This contains fixes for exynos, amdgpu, radeon, i915 and qxl.

  It also contains some fixes to the core drm edid parser.

  qxl:
   - fix for a cursor hotspot issue

  radeon:
   - some MST fixes that I've been running locally and make my monitor a
     bit happier

  exynos:
   - fix some regressions and build fixes

  amdgpu:
   - a couple of small fixes

  i915:
   - two DP MST fixes and a couple of other regression fixes

  Nothing too out of the ordinary or surprising at this point"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/exynos: Use VIDEO_SAMSUNG_S5P_G2D=n as G2D Kconfig dependency
  drm/exynos: fix a warning message
  drm/exynos: mic: fix an error code
  drm/exynos: fimd: fix broken dp_clock control
  drm/exynos: build fbdev code conditionally
  drm/exynos: fix adjusted_mode pointer in exynos_plane_mode_set
  drm/exynos: fix error handling in exynos_drm_subdrv_open
  drm/amd/amdgpu: fix irq domain remove for tonga ih
  drm/i915: fix deadlock on lid open
  drm/radeon: use helper for mst connector dpms.
  drm/radeon/mst: port some MST setup code from DAL.
  drm/amdgpu: add invisible pin size statistic
  drm/edid: Fix DMT 1024x768@43Hz (interlaced) timings
  drm/i915: Exit cherryview_irq_handler() after one pass
  drm/i915: Call intel_dp_mst_resume() before resuming displays
  drm/i915: Fix race condition in intel_dp_destroy_mst_connector()
  drm/edid: Fix parsing of EDID 1.4 Established Timings III descriptor
  drm/edid: Fix EDID Established Timings I and II
  drm/qxl: fix cursor position with non-zero hotspot

Merge branch 'parisc-4.6-4' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc ftrace fixes from Helge Deller:
"This is (most likely) the last pull request for v4.6 for the parisc
  architecture.

  It fixes the FTRACE feature for parisc, which is horribly broken since
   quite some time and doesn't even compile.  This patch just fixes the
  bare minimum (it actually removes more lines than it adds), so that
  the function tracer works again on 32- and 64bit kernels.

  I've queued up additional patches on top of this patch which e.g. add
  the syscall tracer, but those have to wait for the merge window for
  v4.7."

* 'parisc-4.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Fix ftrace function tracer

cpsw: Prevent NUll pointer dereference with two PHYs

Adding a 2nd PHY to cpsw results in a NULL pointer dereference
as below. Fix by maintaining a reference to each PHY node in slave
struct instead of a single reference in the priv struct which was
overwritten by the 2nd PHY.

[   17.870933] Unable to handle kernel NULL pointer dereference at virtual address 00000180
[   17.879557] pgd = dc8bc000
[   17.882514] [00000180] *pgd=9c882831, *pte=00000000, *ppte=00000000
[   17.889213] Internal error: Oops: 17 [#1] ARM
[   17.893838] Modules linked in:
[   17.897102] CPU: 0 PID: 1657 Comm: connmand Not tainted 4.5.0-ge463dfb-dirty #11
[   17.904947] Hardware name: Cambrionix whippet
[   17.909576] task: dc859240 ti: dc968000 task.ti: dc968000
[   17.915339] PC is at phy_attached_print+0x18/0x8c
[   17.920339] LR is at phy_attached_info+0x14/0x18
[   17.925247] pc : [<c042baec>]    lr : [<c042bb74>]    psr: 600f0113
[   17.925247] sp : dc969cf8  ip : dc969d28  fp : dc969d18
[   17.937425] r10: dda7a400  r9 : 00000000  r8 : 00000000
[   17.942971] r7 : 00000001  r6 : ddb00480  r5 : ddb8cb34  r4 : 00000000
[   17.949898] r3 : c0954cc0  r2 : c09562b0  r1 : 00000000  r0 : 00000000
[   17.956829] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
[   17.964401] Control: 10c5387d  Table: 9c8bc019  DAC: 00000051
[   17.970500] Process connmand (pid: 1657, stack limit = 0xdc968210)
[   17.977059] Stack: (0xdc969cf8 to 0xdc96a000)
[   17.981692] 9ce0:                                                       dc969d28 dc969d08
[   17.990386] 9d00: c038f9bc c038f6b4 ddb00480 dc969d34 dc969d28 c042bb74 c042bae4 00000000
[   17.999080] 9d20: c09562b0 c0954cc0 dc969d5c dc969d38 c043ebfc c042bb6c 00000007 00000003
[   18.007773] 9d40: ddb00000 ddb8cb58 ddb00480 00000001 dc969dec dc969d60 c0441614 c043ea68
[   18.016465] 9d60: 00000000 00000003 00000000 fffffff4 dc969df4 0000000d 00000000 00000000
[   18.025159] 9d80: dc969db4 dc969d90 c005dc08 c05839e0 dc969df4 0000000d ddb00000 00001002
[   18.033851] 9da0: 00000000 00000000 dc969dcc dc969db8 c005ddf4 c005dbc8 00000000 00000118
[   18.042544] 9dc0: dc969dec dc969dd0 ddb00000 c06db27c ffff9003 00001002 00000000 00000000
[   18.051237] 9de0: dc969e0c dc969df0 c057c88c c04410dc dc969e0c ddb00000 ddb00000 00000001
[   18.059930] 9e00: dc969e34 dc969e10 c057cb44 c057c7d8 ddb00000 ddb00138 00001002 beaeda20
[   18.068622] 9e20: 00000000 00000000 dc969e5c dc969e38 c057cc28 c057cac0 00000000 dc969e80
[   18.077315] 9e40: dda7a40c beaeda20 00000000 00000000 dc969ecc dc969e60 c05e36d0 c057cc14
[   18.086007] 9e60: dc969e84 00000051 beaeda20 00000000 dda7a40c 00000014 ddb00000 00008914
[   18.094699] 9e80: 30687465 00000000 00000000 00000000 00009003 00000000 00000000 00000000
[   18.103391] 9ea0: 00001002 00008914 dd257ae0 beaeda20 c098a428 beaeda20 00000011 00000000
[   18.112084] 9ec0: dc969edc dc969ed0 c05e4e54 c05e3030 dc969efc dc969ee0 c055f5ac c05e4cc4
[   18.120777] 9ee0: beaeda20 dd257ae0 dc8ab4c0 00008914 dc969f7c dc969f00 c010b388 c055f45c
[   18.129471] 9f00: c071ca40 dd257ac0 c00165e8 dc968000 dc969f3c dc969f20 dc969f64 dc969f28
[   18.138164] 9f20: c0115708 c0683ec8 dd257ac0 dd257ac0 dc969f74 dc969f40 c055f350 c00fc66c
[   18.146857] 9f40: dd82e4d0 00000011 00000000 00080000 dd257ac0 00000000 dc8ab4c0 dc8ab4c0
[   18.155550] 9f60: 00008914 beaeda20 00000011 00000000 dc969fa4 dc969f80 c010bc34 c010b2fc
[   18.164242] 9f80: 00000000 00000011 00000002 00000036 c00165e8 dc968000 00000000 dc969fa8
[   18.172935] 9fa0: c00163e0 c010bbcc 00000000 00000011 00000011 00008914 beaeda20 00009003
[   18.181628] 9fc0: 00000000 00000011 00000002 00000036 00081018 00000001 00000000 beaedc10
[   18.190320] 9fe0: 00083188 beaeda1c 00043a5d b6d29c0c 600b0010 00000011 00000000 00000000
[   18.198989] Backtrace:
[   18.201621] [<c042bad8>] (phy_attached_print) from [<c042bb74>] (phy_attached_info+0x14/0x18)
[   18.210664]  r3:c0954cc0 r2:c09562b0 r1:00000000
[   18.215588]  r4:ddb00480
[   18.218322] [<c042bb60>] (phy_attached_info) from [<c043ebfc>] (cpsw_slave_open+0x1a0/0x280)
[   18.227293] [<c043ea5c>] (cpsw_slave_open) from [<c0441614>] (cpsw_ndo_open+0x544/0x674)
[   18.235874]  r7:00000001 r6:ddb00480 r5:ddb8cb58 r4:ddb00000
[   18.241944] [<c04410d0>] (cpsw_ndo_open) from [<c057c88c>] (__dev_open+0xc0/0x128)
[   18.249972]  r9:00000000 r8:00000000 r7:00001002 r6:ffff9003 r5:c06db27c r4:ddb00000
[   18.258255] [<c057c7cc>] (__dev_open) from [<c057cb44>] (__dev_change_flags+0x90/0x154)
[   18.266745]  r5:00000001 r4:ddb00000
[   18.270575] [<c057cab4>] (__dev_change_flags) from [<c057cc28>] (dev_change_flags+0x20/0x50)
[   18.279523]  r9:00000000 r8:00000000 r7:beaeda20 r6:00001002 r5:ddb00138 r4:ddb00000
[   18.287811] [<c057cc08>] (dev_change_flags) from [<c05e36d0>] (devinet_ioctl+0x6ac/0x76c)
[   18.296483]  r9:00000000 r8:00000000 r7:beaeda20 r6:dda7a40c r5:dc969e80 r4:00000000
[   18.304762] [<c05e3024>] (devinet_ioctl) from [<c05e4e54>] (inet_ioctl+0x19c/0x1c8)
[   18.312882]  r10:00000000 r9:00000011 r8:beaeda20 r7:c098a428 r6:beaeda20 r5:dd257ae0
[   18.321235]  r4:00008914
[   18.323956] [<c05e4cb8>] (inet_ioctl) from [<c055f5ac>] (sock_ioctl+0x15c/0x2d8)
[   18.331829] [<c055f450>] (sock_ioctl) from [<c010b388>] (do_vfs_ioctl+0x98/0x8d0)
[   18.339765]  r7:00008914 r6:dc8ab4c0 r5:dd257ae0 r4:beaeda20
[   18.345822] [<c010b2f0>] (do_vfs_ioctl) from [<c010bc34>] (SyS_ioctl+0x74/0x84)
[   18.353573]  r10:00000000 r9:00000011 r8:beaeda20 r7:00008914 r6:dc8ab4c0 r5:dc8ab4c0
[   18.361924]  r4:00000000
[   18.364653] [<c010bbc0>] (SyS_ioctl) from [<c00163e0>] (ret_fast_syscall+0x0/0x3c)
[   18.372682]  r9:dc968000 r8:c00165e8 r7:00000036 r6:00000002 r5:00000011 r4:00000000
[   18.380960] Code: e92dd810 e24cb010 e24dd010 e59b4004 (e5902180)
[   18.387580] ---[ end trace c80529466223f3f3 ]---

Signed-off-by: Andrew Goodbody <andrew.goodbody@cambrionix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

libnvdimm, pmem: clarify the write+clear_poison+write flow

The ACPI specification does not specify the state of data after a clear
poison operation. Potential future libnvdimm bus implementations for
other architectures also might not specify or disagree on the state of
data after clear poison. Clarify why we write twice.

Reported-by: Jeff Moyer <jmoyer@redhat.com>
Reported-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>

cxgb4: Set VPD size so we can read both VPD structures

Chelsio adapters have two VPD structures stored in the VPD:

  - offset 0x000: an abbreviated VPD, and
  - offset 0x400: the complete VPD.

After 104daa71b396 ("PCI: Determine actual VPD size on first access"), the
PCI core computes the valid VPD size by parsing the VPD starting at offset
0x0.  That size only includes the abbreviated VPD structure, so reads of
the complete VPD at 0x400 fail.

Explicitly set the VPD size with pci_set_vpd_size() so the driver can read
both VPD structures.

[bhelgaas: changelog, split patches, rename to pci_set_vpd_size() and
return int (not ssize_t)]
Fixes: 104daa71b396 ("PCI: Determine actual VPD size on first access")
Tested-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

PCI: Add pci_set_vpd_size() to set VPD size

After 104daa71b396 ("PCI: Determine actual VPD size on first access"), the
PCI core computes the valid VPD size by parsing the VPD starting at offset
0x0.  We don't attempt to read past that valid size because that causes
some devices to crash.

However, some devices do have data past that valid size.  For example,
Chelsio adapters contain two VPD structures, and the driver needs both of
them.

Add pci_set_vpd_size().  If a driver knows it is safe to read past the end
of the VPD data structure at offset 0, it can use pci_set_vpd_size() to
allow access to as much data as it needs.

[bhelgaas: changelog, split patches, rename to pci_set_vpd_size() and
return int (not ssize_t)]
Fixes: 104daa71b396 ("PCI: Determine actual VPD size on first access")
Tested-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

s390: add CPU_BIG_ENDIAN config option

Make sure that s390 appears to be a big endian machine by defining
this config option.

Without this s390 appears to be little endian as seen by e.g. the
recordmount script: "perl ./scripts/recordmcount.pl "s390" "little"
"64""
This has no practical impact within the script since the endian
variable is only evaluated for mips. However there are already a
couple of common code places which evaluate this config option. None
of them is relevant for s390 currently though.

To avoid any issues in the future (and fix the recordmcount oddity)
add the new config option.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

s390/spinlock: avoid yield to non existent cpu

arch_spin_lock_wait_flags() checks if a spinlock is not held before
trying a compare and swap instruction. If the lock is unlocked it
tries the compare and swap instruction, however if a different cpu
grabbed the lock in the meantime the instruction will fail as
expected.

Subsequently the arch_spin_lock_wait_flags() incorrectly tries to
figure out if the cpu that holds the lock is running. However it is
using the wrong cpu number for this (-1) and then will also yield the
current cpu to the wrong cpu.

Fix this by adding a missing continue statement.

Fixes: 470ada6b1a1d ("s390/spinlock: refactor arch_spin_lock_wait[_flags]")
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

s390/dcssblk: fix possible deadlock in remove vs. per-device attributes

dcssblk_remove_store() holds the dcssblk_devices_sem semaphore while
calling device_unregister(), which in turn tries to acquire the kernfs
kn->dev_map rwsem for the device sysfs subtree. The same rwsem is also
acquired when using the per-device sysfs attributes in the device sub-tree,
and the attribute handlers then also acquire the dcssblk_devices_sem.

This can lead to a deadlock when removing a DCSS while concurrently
reading from / writing to one of its sysfs attributes. The following
lockdep warning hinted towards the issue (CPU0 = dcssblk_remove_store,
CPU1 = dcssblk_shared_store):

[   76.496047]  Possible unsafe locking scenario:

[   76.496054]        CPU0                    CPU1
[   76.496059]        ----                    ----
[   76.496087]   lock(&dcssblk_devices_sem);
[   76.496090]                                lock(s_active#175);
[   76.496106]                                lock(&dcssblk_devices_sem);
[   76.496110]   lock(s_active#175);
[   76.496115]
*** DEADLOCK ***

Fix this by releasing the dcssblk_devices_sem semaphore, which only
protects internal DCSS data, before calling device_unregister().

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

thinkpad_acpi: Silence an uninitialized variable warning

If fan_get_status() fails then "s" is not initialized. Tweak the error
handling a bit to silence this warning.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

intel_telemetry_pltdrv: Silence an uninitialized variable warning

Presumably "pss_period" and "ioss_period" can't both be zero, but this
function is never called so we can't infer that using static analysis
alone.

Silence the warning by setting "ret" to zero.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

hp_accel: Silence an uninitialized variable warning

If acpi_evaluate_integer() fails then "lret" isn't initialized. I've
tweaked the error handling to avoid this issue.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

block: loop: fix filesystem corruption in case of aio/dio

Starting from commit e36f620428(block: split bios to max possible length),
block core starts to split bio in the middle of bvec.

Unfortunately loop dio/aio doesn't consider this situation, and
always treat 'iter.iov_offset' as zero. Then filesystem corruption
is observed.

This patch figures out the offset of the base bvevc via
'bio->bi_iter.bi_bvec_done' and fixes the issue by passing the offset
to iov iterator.

Fixes: e36f6204288088f (block: split bios to max possible length)
Cc: Keith Busch <keith.busch@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org (4.5)
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

crypto: ccp - Prevent information leakage on export

Prevent information from leaking to userspace by doing a memset to 0 of
the export state structure before setting the structure values and copying
it. This prevents un-initialized padding areas from being copied into the
export area.

Cc: <stable@vger.kernel.org> # 3.14.x-
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: sha1-mb - use corrcet pointer while completing jobs

In sha_complete_job, incorrect mcryptd_hash_request_ctx pointer is used
when check and complete other jobs. If the memory of first completed req
is freed, while still completing other jobs in the func, kernel will
crash since NULL pointer is assigned to RIP.

Cc: <stable@vger.kernel.org>
Signed-off-by: Xiaodong Liu <xiaodong.liu@intel.com>
Acked-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto: rsa-pkcs1pad - fix dst len

The output buffer length has to be at least as big as the key_size.
It is then updated to the actual output size by the implementation.

Cc: <stable@vger.kernel.org>
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

ARM: 8551/2: DMA: Fix kzalloc flags in __dma_alloc

Commit 19e6e5e5392b ("ARM: 8547/1: dma-mapping: store buffer
information") allocates a structure meant for internal buffer management
with the GFP flags of the buffer itself. This can trigger the following
safeguard in the slab/slub allocator:

if (unlikely(flags & GFP_SLAB_BUG_MASK)) {
pr_emerg("gfp: %un", flags & GFP_SLAB_BUG_MASK);
BUG();
}

Fix this by filtering the flags that make the slab allocator unhappy.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

hp_accel: Add support for HP ProBook 440 G3

HP ProBook 440 G3 laptop needs a non-standard mapping (x_inverted_usd).

Signed-off-by: Martin Vajnar <martin.vajnar@gmail.com>
Acked-by: Éric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
"Misc fixes: a binutils fix, an lguest fix, an mcelog fix and a missing
  documentation fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce: Avoid using object after free in genpool
  lguest, x86/entry/32: Fix handling of guest syscalls using interrupt gates
  x86/build: Build compressed x86 kernels as PIE
  x86/mm/pkeys: Add missing Documentation

Merge branch 'mm-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull mm gup cleanup from Ingo Molnar:
"This removes the ugly get-user-pages API hack, now that all upstream
code has been migrated to it"

("ugly" is putting it mildly. But it worked.. - Linus)

* 'mm-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
mm/gup: Remove the macro overload API migration helpers from the get_user*() APIs

Merge tag 'dm-4.6-fixes' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

- fix a 4.6-rc1 bio-based DM 'struct dm_target_io' leak in an error
   path

- stable@ fix for DM cache metadata's READ_LOCK macros that were
   incorrectly returning error if the block manager was in read-only
   mode; also cleanup multi-statement macros to use do {} while(0)

* tag 'dm-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros
  dm: fix dm_target_io leak if clone_bio() returns an error

Merge tag 'pwm/for-4.6-rc4' of git://git./linux/kernel/git/thierry.reding/linux-pwm

Pull pwm fix from Thierry Reding:
"A single one-line fix to turn the regmap cache from an RB-tree to a
flat cache to avoid lockdep and abort issues"

* tag 'pwm/for-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: fsl-ftm: Use flat regmap cache

Merge tag 'sound-4.6-rc4' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
"We've had a very calm development cycle, so far.  Here are the few
  fixes for HD-audio and USB-audio, all of which are small and easy"

* tag 'sound-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Fix inconsistent monitor_present state until repoll
  ALSA: hda - Fix regression of monitor_present flag in eld proc file
  ALSA: usb-audio: Skip volume controls triggers hangup on Dell USB Dock
  ALSA: hda/realtek - Enable the ALC292 dock fixup on the Thinkpad T460s
  ALSA: sscape: Use correct format identifier for size_t
  ALSA: usb-audio: Add a quirk for Plantronics BT300
  ALSA: usb-audio: Add a sample rate quirk for Phoenix Audio TMX320
  ALSA: hda - Bind with i915 only when Intel graphics is present

Merge branch 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration

Pull mailbox fixes from Jussi Brar:
"Misc fixes:

  mailbox-test driver:
   - prevent memory leak and another cosmetic change

  mailbox:
   - change the returned error code

  Xgene driver:
   - return -ENOMEM instead of PTR_ERR for failed devm_kzalloc"

* 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
  mailbox: Stop using ENOSYS for anything other than unimplemented syscalls
  mailbox: mailbox-test: Prevent memory leak
  mailbox: mailbox-test: Use more consistent format for calling copy_from_user()
  mailbox: xgene-slimpro: Fix wrong test for devm_kzalloc

Merge tag 'for-linus-4.6-rc4' of git://git./linux/kernel/git/jaegeuk/f2fs

Pull f2fs/fscrypto fixes from Jaegeuk Kim:
"In addition to f2fs/fscrypto fixes, I've added one patch which
  prevents RCU mode lookup in d_revalidate, as Al mentioned.

  These patches fix f2fs and fscrypto based on -rc3 bug fixes in ext4
  crypto, which have not yet been fully propagated as follows.

   - use of dget_parent and file_dentry to avoid crashes
   - disallow RCU-mode lookup in d_invalidate
   - disallow -ENOMEM in the core data encryption path"

* tag 'for-linus-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
  ext4/fscrypto: avoid RCU lookup in d_revalidate
  fscrypto: don't let data integrity writebacks fail with ENOMEM
  f2fs: use dget_parent and file_dentry in f2fs_file_open
  fscrypto: use dget_parent() in fscrypt_d_revalidate()

bgmac: fix MAC soft-reset bit for corerev > 4

Only core revisions older than 4 use BGMAC_CMDCFG_SR_REV0. This mainly
fixes support for BCM4708A0KF SoCs with Ethernet core rev 5 (it means
only some devices as most of BCM4708A0KF-s got core rev 4).
This was tested for regressions on BCM47094 which doesn't seem to care
which bit gets used.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:
"This fixes an NFS regression caused by the skcipher/hash conversion in
  sunrpc.  It also fixes a build problem in certain configurations with
  bcm63xx"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  hwrng: bcm63xx - fix device tree compilation
  sunrpc: Fix skcipher/shash conversion

Merge branch 'soreuseport-mixed-v4-v6-fixes'

Craig Gallek says:

====================
Fixes for SO_REUSEPORT and mixed v4/v6 sockets

Recent changes to the datastructures associated with SO_REUSEPORT broke
an existing behavior when equivalent SO_REUSEPORT sockets are created
using both AF_INET and AF_INET6. This patch series restores the previous
behavior and includes a test to validate it.

This series should be a trivial merge to stable kernels (if deemed
necessary), but will have conflicts in net-next. The following patches
recently replaced the use of hlist_nulls with hlists for UDP and TCP
socket lists:
ca065d0cf80f ("udp: no longer use SLAB_DESTROY_BY_RCU")
3b24d854cb35 ("tcp/dccp: do not touch listener sk_refcnt under synflood")

If this series is accepted, I will send an RFC for the net-next change
to assist with the merge.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

soreuseport: test mixed v4/v6 sockets

Test to validate the behavior of SO_REUSEPORT sockets that are
created with both AF_INET and AF_INET6. See the commit prior to this
for a description of this behavior.

Signed-off-by: Craig Gallek <kraig@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

soreuseport: fix ordering for mixed v4/v6 sockets

With the SO_REUSEPORT socket option, it is possible to create sockets
in the AF_INET and AF_INET6 domains which are bound to the same IPv4 address.
This is only possible with SO_REUSEPORT and when not using IPV6_V6ONLY on
the AF_INET6 sockets.

Prior to the commits referenced below, an incoming IPv4 packet would
always be routed to a socket of type AF_INET when this mixed-mode was used.
After those changes, the same packet would be routed to the most recently
bound socket (if this happened to be an AF_INET6 socket, it would
have an IPv4 mapped IPv6 address).

The change in behavior occurred because the recent SO_REUSEPORT optimizations
short-circuit the socket scoring logic as soon as they find a match.  They
did not take into account the scoring logic that favors AF_INET sockets
over AF_INET6 sockets in the event of a tie.

To fix this problem, this patch changes the insertion order of AF_INET
and AF_INET6 addresses in the TCP and UDP socket lists when the sockets
have SO_REUSEPORT set.  AF_INET sockets will be inserted at the head of the
list and AF_INET6 sockets with SO_REUSEPORT set will always be inserted at
the tail of the list.  This will force AF_INET sockets to always be
considered first.

Fixes: e32ea7e74727 ("soreuseport: fast reuseport UDP socket selection")
Fixes: 125e80b88687 ("soreuseport: fast reuseport TCP socket selection")
Reported-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: Craig Gallek <kraig@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

cdc_mbim: apply "NDP to end" quirk to all Huawei devices

We now have a positive report of another Huawei device needing
this quirk: The ME906s-158 (12d1:15c1). This is an m.2 form
factor modem with no obvious relationship to the E3372 (12d1:157d)
we already have a quirk entry for. This is reason enough to
believe the quirk might be necessary for any number of current
and future Huawei devices.

Applying the quirk to all Huawei devices, since it is crucial
to any device affected by the firmware bug, while the impact
on non-affected devices is negligible.

The quirk can if necessary be disabled per-device by writing
N to /sys/class/net/<iface>/cdc_ncm/ndp_to_end

Reported-by: Andreas Fett <andreas.fett@secunet.com>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'for-linus' of git://git./linux/kernel/git/jmorris/linux-security

Pull keys bugfixes from James Morris:
"Two bugfixes for Keys related code"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
ASN.1: fix open failure check on headername
assoc_array: don't call compare_object() on a node

dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros

The READ_LOCK macro was incorrectly returning -EINVAL if
dm_bm_is_read_only() was true -- it will always be true once the cache
metadata transitions to read-only by dm_cache_metadata_set_read_only().

Wrap READ_LOCK and WRITE_LOCK multi-statement macros in do {} while(0).
Also, all accesses of the 'cmd' argument passed to these related macros
are now encapsulated in parenthesis.

A follow-up patch can be developed to eliminate the use of macros in
favor of pure C code. Avoiding that now given that this needs to apply
to stable@.

Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Fixes: d14fcf3dd79 ("dm cache: make sure every metadata function checks fail_io")
Cc: stable@vger.kernel.org

bgmac: reset & enable Ethernet core before using it

This fixes Ethernet on D-Link DIR-885L with BCM47094 SoC. Felix reported
similar fix was needed for his BCM4709 device (Buffalo WXR-1900DHP?).
I tested this for regressions on BCM4706, BCM4708A0 and BCM47081A0.

Cc: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>